深部开采高地压煤层钻孔有效抽采半径测定技术研究  

Research on Determine Effective Gas Drainage Radius of High Pressure Coal Seam in Deep Mining

作　　者：周亮[1] 戴广龙[1] 秦汝祥[1] 

机构地区：[1]安徽理工大学能源与安全学院,安徽淮南232001

出　　处：《煤炭技术》2017年第4期27-29,共3页Coal Technology

基　　金：国家自然科学基金项目(51574009);安徽省教育厅自然科学基金项目(KJ2016A829)

摘　　要：为准确测量深部开采高地压煤层瓦斯抽采有效半径,以确定合理的抽采钻孔布置间距,对传统的压降法进行适当改进。采用钻孔布置优化设计及钻孔封孔优化设计相结合的方法进行有效半径的测定。现场实验表明:钻孔瓦斯抽采有效半径与抽采时间相关,随抽采时间增长有效半径逐渐增大。By improving the traditional pressure dropped measurement, determine effective gas drainage radius of high pressure coal seam in deep mining is accurately measured to identify the reasonable arrangement of drainage borehole spacing. New bore hole sealing technology and new borehole layout method are applied. The field test result shows that the gas effective drainage radius is increased as predrainage time prolonged.

关 键 词：有效半径 瓦斯压力 瓦斯抽采 

分 类 号：TD712[矿业工程—矿井通风与安全]